CN107218266A - Ultrahigh pressure cylinder sealing structure - Google Patents
Ultrahigh pressure cylinder sealing structure Download PDFInfo
- Publication number
- CN107218266A CN107218266A CN201710622007.0A CN201710622007A CN107218266A CN 107218266 A CN107218266 A CN 107218266A CN 201710622007 A CN201710622007 A CN 201710622007A CN 107218266 A CN107218266 A CN 107218266A
- Authority
- CN
- China
- Prior art keywords
- pressure
- piston
- sealing
- oil
- sealing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
Abstract
The invention discloses a kind of ultrahigh pressure cylinder sealing structure, especially a kind of ultrahigh pressure cylinder sealing structure applied to Superhigh Pressure Hydraulic System field.The ultrahigh pressure cylinder sealing structure of the present invention, including cylinder barrel, piston, the piston is located in inner wall of cylinder, one end of the piston is additionally provided with piston rod, in addition to pressure strip, sealing gasket, sealing ring and oil distributor, and the inwall of the sealing ring is coated on the outer surface of oil distributor, the oily passage of seal pressure is provided with piston and piston rod, it is provided with the oil distributor on sealing oil circuit, the oily passage of the seal pressure and is provided with pressure-control circuit interface, the pressure strip is connected by screw with piston.Sealing oil pressure can be adjusted flexibly in the ultrahigh pressure cylinder sealing structure of the present invention, reduce seal and bear load, greatly prolong seal durability, significantly improve Superhigh Pressure Hydraulic System sealing effectiveness.
Description
Technical field
It is especially a kind of applied to Superhigh Pressure Hydraulic System field the present invention relates to a kind of ultrahigh pressure cylinder sealing structure
Ultrahigh pressure cylinder sealing structure.
Background technology
Superhigh Pressure Hydraulic System is in field of industrial production important role.Superhigh Pressure Hydraulic System, because oil pressure is very high,
Compared to general hydraulic system, oil cylinder executing agency is easier to leak, and influences the performance of oil cylinder.Therefore for superelevation hydraulic fluid
How pressure system, ensure that oil cylinder executing agency does not leak, and is the major issue that oil cylinder designer must take into consideration.Particularly
The internal leakage of oil cylinder, when designing the sealing structure between ultrahigh pressure cylinder piston and cylinder barrel, i.e., will ensure oil cylinder starting pressure
With internal leakage no more than national standard requirement, ensure the service life of cylinder seal again, and reduce as far as possible because of sealing production
The raw hydraulic pressure loss of energy.Superhigh Pressure Hydraulic System of the prior art for the sealing of oil cylinder is used system pressure by from oil
Sealing structure is incorporated into cylinder, the sealing of ultrahigh-pressure hydraulic cylinder is realized, when the scheme of prior art is due to make use of system pressure
Oil, its oil pressure is determined by system working pressure, and the oil pressure of Superhigh Pressure Hydraulic System is very high, the hydraulic pressure for causing seal to bear
Power is also very high, and the frictional force between sealing and cylinder barrel is larger, makes the starting pressure of oil cylinder larger, while having a strong impact on seal
Service life, reduces sealing effectiveness.
The content of the invention
The technical problems to be solved by the invention, which are to provide one kind, can be adjusted flexibly sealing oil pressure, reduce seal and bear
Load, greatly prolongs seal durability, significantly improves the ultrahigh pressure cylinder sealing knot of Superhigh Pressure Hydraulic System sealing effectiveness
Structure.
The present invention solves the ultrahigh pressure cylinder sealing structure that its technical problem is used, including cylinder barrel, piston, the piston
In inner wall of cylinder, one end of the piston is additionally provided with piston rod, in addition to pressure strip, sealing gasket, sealing ring and cloth oil
Device, the inwall of the sealing ring is coated on the outer surface of oil distributor, and the sealing ring is arranged on the outer wall and cylinder barrel of pistons end
Inwall joint, is provided with the oily passage of seal pressure, the oil distributor in piston and piston rod and is provided with sealing ring
Pressure-control circuit interface is provided with the sealing oil circuit that wall is connected with the oily passage of seal pressure, the oily passage of the seal pressure, it is described
Sealing gasket is arranged on the side of sealing ring dorsad piston, and the pressure strip is located at the side of sealing gasket dorsad sealing ring, the pressure
Tight plate is connected by screw with piston.
It is further that the radial compaction face towards inner wall of cylinder is provided with the sealing ring, towards pistons end
Clamping plane and the axial compression face towards sealing gasket.
It is further, in addition to pressure ring, the side of the sealing ring towards sealing gasket is provided with installation step, institute's pressure ring
It is arranged at installation step, the pressure ring is connected with sealing ring by screw with piston.
Further that first order step and second level step are provided with the piston, the first order step and
Second level step is located at the position that pistons end is contacted with sealing ring.
The beneficial effects of the invention are as follows：Because the seal pressure oil of the application is provided by outside pressure-control circuit, sealing pressure
The oil pressure of power oil can be according to planform feature, size, position relationship, and annexation etc. is adjusted flexibly, and is in oil pressure
Reliable and effective sealing can be met, seal load can be mitigated again, reduces the frictional force between sealing and cylinder barrel, therefore reduce
The optimal value of the starting pressure of oil cylinder.While excellent sealing effect is realized, the physical life of related components is extended, is subtracted
System pressure losses are lacked.
Brief description of the drawings
Fig. 1 is the structural representation of the application；
Fig. 2 is the partial enlarged drawing of the application sealing structure part；
Parts, position and numbering in figure：Cylinder barrel 1, piston 2, piston rod 3, pressure strip 4, sealing gasket 5, sealing ring 6, cloth
The oily passage 8 of oily device 7, seal pressure, sealing oil circuit 9, radial compaction face 10, clamping plane 11, axial compression face 12, pressure ring 13,
Installation step 14, first order step 15, second level step 16.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, ultrahigh pressure cylinder sealing structure of the invention, including cylinder barrel 1, piston 2,2, the piston
In the inwall of cylinder barrel 1, one end of the piston 2 is additionally provided with piston rod 3, in addition to pressure strip 4, sealing gasket 5, the and of sealing ring 6
Oil distributor 7, the inwall of the sealing ring 6 is coated on the outer surface of oil distributor 7, and the sealing ring 6 is arranged on the outer of the end of piston 2
Wall and the inwall joint of cylinder barrel 1, are provided with the oily passage 8 of seal pressure, the oil distributor 7 in piston 2 and piston rod 3 and set
Have and be provided with tune on the sealing oil circuit 9 for connecting the oily passage 8 of the inwall of sealing ring 6 and seal pressure, the oily passage 8 of the seal pressure
Circuit interface is pressed, the sealing gasket 5 is arranged on the side of the dorsad piston 2 of sealing ring 6, and the pressure strip 4 is located at sealing gasket 5 dorsad
The side of sealing ring 6, the pressure strip 4 is connected by screw with piston 2.The application when in use by pressure-control circuit interface with it is outer
The hydraulic pressure fuel feeding pressure-control circuit connection in portion, pressure is pressed oil from the He of piston 2 by the sealing fluid of hydraulic pressure fuel feeding pressure-control circuit accuracy controlling
The oily passage 8 of seal pressure in piston rod 3 enters the oil distributor 7 positioned at sealing position, then the sealing oil circuit 9 for passing through oil distributor 7
Sealing ring 6 is delivered to, seal pressure oil makes sealing ring 6 be opened to surrounding, the inwall of cylinder barrel 1 is compressed upwards, compressed live respectively to the left and right
Plug 2 and sealing gasket 5, make the inwall of cylinder barrel 1, piston 2, sealing gasket 5 and sealing ring 6 form complete reliable sealing system, by hydraulic pressure
Two chambers that cylinder is separated by piston 2, are isolated entirely from, so as to realize effective sealing.Pressure strip 4.Sealing gasket 5 is used by pressure strip 4
Be screwed compression, and adopt and be screwed, and prevents pressure strip 4 from loosening under force, it is ensured that sealing ring 6 and sealing
The sealing effectiveness of pad 5.Because the seal pressure oil of the application is provided by outside pressure-control circuit, the oil pressure of seal pressure oil can root
According to planform feature, size, position relationship, annexation etc. is adjusted flexibly, make oil pressure be in can meet it is reliable and
Effectively sealing, can mitigate seal load, the frictional force between reduction sealing and cylinder barrel 1, therefore reduction oil cylinder again plays dynamic pressure
The optimal value of power.While excellent sealing effect is realized, the physical life of related components is extended, system pressure is reduced
Loss.Wherein the parts such as pressure strip 4, sealing gasket 5, sealing ring 6, the pressure ring 13 of oil distributor 7 are two sets, are symmetricly set on piston 2
Two ends.
The radial compaction face 10 towards the inwall of cylinder barrel 1 is provided with the sealing ring 6, is put down towards the compression of the end of piston 2
Face 11 and the axial compression face 12 towards sealing gasket 5.It is the structure of the application in relatively small oil to increase sealing effectiveness
Pressure also can guarantee that effective sealing, and the application is on the sealing ring 6 positioned at the outer wall of the end of piston 2 Yu the inwall joint of cylinder barrel 1
Radial compaction face 10, clamping plane 11 and axial compression face 12 are set, make sealing ring 6 under oil pressure effect with the inwall of cylinder barrel 1, work
Plug 2 and the even closer laminating of sealing gasket 5, prevent system pressure oil from being leaked from the end of piston 2 and the inwall joint of cylinder barrel 1.Specifically
During implementation can foregoing three faces location arrangements Seal Oil oilhole, allow Seal Oil to act directly on foregoing three seal faces
On.
Also include pressure ring 13, the side of sealing ring 6 towards the sealing gasket 5 is provided with installation step 14, and institute's pressure ring 13 is set
Put at installation step 14, the pressure ring 13 is connected with sealing ring 6 by screw with piston 2.For convenience of the installation of oil distributor 7,
Its Front-end Design pressure ring 13 of one oil distributor 7, so as to the stable cloth oil of oil distributor 7, oil distributor 7 is using pressure ring 13 respectively in side
Face pressure is fastened.
First order step 15 and second level step 16, the first order step 15 and second are provided with the piston 2
Level step 16 is located at the position that the end of piston 2 is contacted with sealing ring 6.First order step 15 and the second level are provided with the piston 2
Step 16 is used to realize being accurately positioned and installing for sealing ring 6, while increasing the sealing area of sealing ring 6, increase Seal Oil is let out
The difficulty of leakage, further improves sealing effectiveness.
Claims (4)
1. ultrahigh pressure cylinder sealing structure, including cylinder barrel (1), piston (2), the piston (2) are located in cylinder barrel (1) inwall, institute
The one end for stating piston (2) is additionally provided with piston rod (3), it is characterised in that：Also include pressure strip (4), sealing gasket (5) (5), sealing
Ring (6) and oil distributor (7), the inwall of the sealing ring (6) are coated on the outer surface of oil distributor (7), and the sealing ring (6) is set
Outer wall and cylinder barrel (1) inwall joint in piston (2) end, are provided with seal pressure oil in piston (2) and piston rod (3)
The sealing oil circuit for connecting the oily passage (8) of sealing ring (6) inwall and seal pressure is provided with passage (8), the oil distributor (7)
(9) pressure-control circuit interface, is provided with the oily passage (8) of the seal pressure, the sealing gasket (5) is arranged on sealing ring (6) back of the body
To the side of piston (2), the pressure strip (4) is located at the side of sealing gasket (5) dorsad sealing ring (6), and the pressure strip (4) is led to
Screw is crossed to be connected with piston (2).
2. ultrahigh pressure cylinder sealing structure as claimed in claim 1, it is characterised in that：Court is provided with the sealing ring (6)
To the radial compaction face (10) of cylinder barrel (1) inwall, towards the clamping plane (11) of piston (2) end and towards sealing gasket (5)
Axial compression face (12).
3. utilize the ultrahigh pressure cylinder sealing structure of claim 1, it is characterised in that：Also include pressure ring (13), the sealing ring
(6) side of sealing gasket (5) is provided with installation step (14), institute's pressure ring (13) is arranged on installation step (14) place, described
Pressure ring (13) is connected with sealing ring (6) by screw with piston (2).
4. ultrahigh pressure cylinder sealing structure as claimed in claim 1, it is characterised in that：Is provided with the piston (2)
One-level step (15) and second level step (16), the first order step (15) and second level step (16) are held positioned at piston (2)
The position that portion is contacted with sealing ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622007.0A CN107218266A (en) | 2017-07-27 | 2017-07-27 | Ultrahigh pressure cylinder sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710622007.0A CN107218266A (en) | 2017-07-27 | 2017-07-27 | Ultrahigh pressure cylinder sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107218266A true CN107218266A (en) | 2017-09-29 |
Family
ID=59954859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710622007.0A Pending CN107218266A (en) | 2017-07-27 | 2017-07-27 | Ultrahigh pressure cylinder sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107218266A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780518A (en) * | 2020-06-23 | 2021-05-11 | 彭娜 | Double-cylinder pumping device with stroke controlled for viscous material |
| CN112879384A (en) * | 2021-01-13 | 2021-06-01 | 一重集团大连工程技术有限公司 | Ultrahigh pressure oil cylinder for compensating sealing clearance by using annular groove structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2797972A (en) * | 1955-06-10 | 1957-07-02 | Ralph W Walsh | Internally pressurized piston and seal units |
| DE3131638A1 (en) * | 1981-08-11 | 1983-03-03 | Ridder & Arens, 4300 Essen | Sealing device |
| CN1114005A (en) * | 1994-05-30 | 1995-12-27 | 丛学沂 | hydraulic cylinder combined piston and super high pressure sealing method |
| DE10100408A1 (en) * | 2001-01-02 | 2002-07-25 | Walter Hunger | Stripper device, especially for pistons or piston rods is ring-shaped and has adjusting device to vary contact pressure on piston/rod |
| DE10121406A1 (en) * | 2001-04-25 | 2002-11-21 | Walter Hunger | System for sealing piston rod in cylinder comprises annular seal and sealing ring system enclosing expandable tube filled with pressurizing medium, extra medium being added through cannula with cutting tip |
| CN103352979A (en) * | 2013-08-03 | 2013-10-16 | 刘立起 | Drum-type pressurized multi-ring compound sealing plunger |
| CN207004978U (en) * | 2017-07-27 | 2018-02-13 | 攀枝花学院 | Ultrahigh pressure cylinder sealing structure |
-
2017
- 2017-07-27 CN CN201710622007.0A patent/CN107218266A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2797972A (en) * | 1955-06-10 | 1957-07-02 | Ralph W Walsh | Internally pressurized piston and seal units |
| DE3131638A1 (en) * | 1981-08-11 | 1983-03-03 | Ridder & Arens, 4300 Essen | Sealing device |
| CN1114005A (en) * | 1994-05-30 | 1995-12-27 | 丛学沂 | hydraulic cylinder combined piston and super high pressure sealing method |
| DE10100408A1 (en) * | 2001-01-02 | 2002-07-25 | Walter Hunger | Stripper device, especially for pistons or piston rods is ring-shaped and has adjusting device to vary contact pressure on piston/rod |
| DE10121406A1 (en) * | 2001-04-25 | 2002-11-21 | Walter Hunger | System for sealing piston rod in cylinder comprises annular seal and sealing ring system enclosing expandable tube filled with pressurizing medium, extra medium being added through cannula with cutting tip |
| CN103352979A (en) * | 2013-08-03 | 2013-10-16 | 刘立起 | Drum-type pressurized multi-ring compound sealing plunger |
| CN207004978U (en) * | 2017-07-27 | 2018-02-13 | 攀枝花学院 | Ultrahigh pressure cylinder sealing structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780518A (en) * | 2020-06-23 | 2021-05-11 | 彭娜 | Double-cylinder pumping device with stroke controlled for viscous material |
| CN112855520A (en) * | 2020-06-23 | 2021-05-28 | 彭娜 | Double-cylinder pumping device with stroke controlled for viscous material |
| CN112780518B (en) * | 2020-06-23 | 2022-04-22 | 江苏锡安达防爆股份有限公司 | Double-cylinder pumping device with stroke controlled for viscous material |
| CN112855520B (en) * | 2020-06-23 | 2022-04-22 | 江苏锡安达防爆股份有限公司 | Double-cylinder pumping device with stroke controlled for viscous material |
| CN112879384A (en) * | 2021-01-13 | 2021-06-01 | 一重集团大连工程技术有限公司 | Ultrahigh pressure oil cylinder for compensating sealing clearance by using annular groove structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170929 |